Facebook initially said Security breach allow hackers to steal more than 50 million accounts access tokens by exploiting the software vulnerability in View As feature. Facebook said hackers accessed 29 million Facebook users data by the recent data breach and stolen users personal details such as Email and phone number and other data what compromised user had in their accounts. Facebook confirmed it as a cyber attack due to the vulnerability and they closed the vulnerability within two days also stopped the attack. The attack did not include Messenger, Messenger Kids, Instagram, WhatsApp, Oculus, Workplace, Pages, payments, third-party apps, or advertising or developer accounts.”]
Source: https://gbhackers.com/29-million-facebook-users-data-stolen/